Milling bolster



March 8; 1949.

E. MANESS ET AL MILLING BOLSTER 4 Sheets-Sheet 1 Filed July 16, 1946 llilllllllll v grvvq/niob'. EVERETTE L. MANESS JAMES A. Mc DUFFlE arch 8, 1949. MANESS ET AL 2,463,705

MILLING BOLS TER Filed July 16, 1946 4 Sheets-Sheet 2 EVERETTE L. MANESS JAMES A. McDUFFlE March 8, 1949. v E. MANESS ET AL 2,463,705

MILLI-NG BOLSTER Filed July 16, 1946 4 Shets-Sheet s P 9 7 LL EVERETTE L. MANESS JAMES A. MCDUFFIE March 8, 1949. E. MANESS ET AL MILLING BOLSTER 4 Sheets-Sheet 4 Filed July 16, 1946 Zjvwmvto OS'. EVERETTE L. MAN E35 JAMES A. McDUFFlE Patented Mar. 8, 1949 UNITED STATES PATENT OFFICE MILLING BOLSTER Everette L. Maness and James D. McDufiie, Kannapolis, N. 0.

3 Claims. 1

This invention relates to a millin machine and more especially to a milling machine especially adapted for the milling out of the worn bearing portions of hook bolsters in fiber preparation machinery.

In fiber preparation machinery, there are a plurality of bolsters for receiving the revolving package onto which the yarn, sliver and the like is wound. These bolsters are suitably secured on the machine and some of the bolsters are termed hook bolsters because they have hook portions in which a shaft is rotatably mounted, and which shaft extends from one end of the machine to the other. Adjacent each bolster there is a beveled gear mounted on the shaft and each bolster has a beveled gear mounted thereon meshing with the beveled gear on the shaft for imparting rotation to the bolster to wind thereon the yarn, sliver, roving and the like.

It is well known that after a predetermined length of operation, the bearing portions in the hooks on the hook bolsters wear down to Where the beveled gear on the shaft will not properly engage the beveled gear on the bolster and thus proper rotation will not be imparted to the bolster to wind the material thereonto.

With our machine, we propose to mill out the bottom of the hooked portion to a larger diameter and in the form of a semi-circular cavity with shoulders at the top thereof and into which a semi-circular or split bearing can be pressed thus to provide a new bearing surface for the hooked bolster which new bearing surface can be of brass, alloy, or any other suitable material, such as an oilite bearing.

By the use of this mechanism it is possible to rework bolsters at a very low cost, representing only a small percentage of the cost of new bolsters, and thus providing a bolster which is better than a new one, because the removable bearings can be renewed from time to time without an additional milling operation.

It is an object of this invention to provide a milling machine having a rotary cutting tool which we prefer to call a rose bud cutting tool, which has a cutting surface in the form of a semi-circle in longitudinal section and which cutting tool, which, at one end, is a larger transverse diameter or has a larger radius than the shaft of which it is a part, thus permitting a semi-circular groove to be cut in the bottom of the bearing groove, which is of greater radius than the radius of the groove in the bottom of which it is out, so as to form shoulders to provide a seat for an insert bearing to be installed i the hooked bolster in position, and means for causing relative movement between the bolster and the cutting tool for milling an enlarged groove in the bottom of the groove already appearing in the hooked bolster with said groove having shoulders and having a greater diameter than the transverse diameter of the groove so as to provide shoulders and into this cavity with shoulders, a semi-circular bearing member is adapted to be inserted.

It is still another object of this invention to provide a stationary rose bud cutting tool and means for clampin a hooked bolster in position, and means for feeding the hooked bolster into contact with the cutting tool for cutting the groove in the bottom of the hook bolster to a larger and deeper dimension than it was before the cutting operation to thereby provide a cavity with shoulders into which a new bearing member can be inserted.

Some of the objects of the invention having been stated, other objects will appear as the description proceeds, when taken in connection with the accompanying drawings, in which Figure l is a front elevation of the apparatus;

Figure 2 is a top plan View of the apparatus;

Figure 3 is a vertical sectional view taken along the line 3-3 in Figures 1 and 2;

Figure 4 is an elevation, with parts broken away, of the cutting tool and one end of the shaft on which it is mounted;

Figure 5 is an elevation of a portion of a hook bolster as it appears after a milling operation;

Figure 6 is an isometric view of the type of bearing adapted to be inserted into the milled out portion of Figure 5;

Figure 7 is a vertical sectional view taken along the line 1-! in Figure 3;

Figure 8 is a sectional view taken along the line 88 in Figure 4.

Referring more specifically to the drawings, the numeral I0 indicates a bed plate preferably of channel iron, which has mounted on the upper surface thereof and on each end thereof channel members II and 12. The upper flanges of said channel members H and I2 have therein a plurality of slots l3, which are penetrated by bolts M to secure bearing members 15 and It to the top surfaces of the channel members II and i2. In these bearings l5 and I6 is adjustably mounted a shaft ll by any suitable means, such as set screws [8. Secured on shaft 11 by set screw 25 is a bracket 20 having a table portion 2| on which is mounted a plate 22 which has mounted thereon a motor 23 by means of suitable bolts 2%. The bracket table 2| is suitably slotted, as at 25, and has a plurality of bolts 21 penetrating the same, for a'djustably mounting the motor 23 in position. The motor 23 has a pulley 28 on its shaft on which is mounted a V-belt 29, which is also mounted on a pulley 33 secured on a rotary shaft 30, which is rotatably mounted in bearing blocks 3| and 32. To the bearing block 3! is secured an extended bearing 34 by means of bolts 35 and a collar 36 is adjustably mounted on shaft 30 for confining the shaft 30 against endwise movement. The bearing block 32 is secured, as by a bolt 40, to a block 4!. Blocks 3| and 4| are suitably keyed by means of keys 42 and 43 on the shaft 11.

The end of the shaft 30 remote from the pulley 33 is interiorly threaded and receives a threaded portion 45 of a cutting tool 46, which has a semicircular series of cutting teeth 41 thereon, the diameter of the same at their termination being greater than the portion 46.

The bearing blocks I5 and it have suitable shims 48 between their lower surfaces and the upper surfaces of the channel members H and I2 so as to adjust the vertical distance between the cutting tool and the top surface of base plate 10. Also shaft H can be adjusted by slightly rtating the same to also adjust the vertical position of shaft 30.

Disposed on top of the bed plate It] are shims and 52 and resting on these shims are transverse members 53 and 54 and resting on top of the transverse members 53 and 54 is a plate 55, having a narrow slot 56 in its top portion merging with a. broader slot 51 in its bottom portion. Suitable bolts 5! and 62 penetrate plate 55 and transverse members 53 and 54, as well as shims 5i and 52 and the top portion of bed plate In to form a unitary assembly. Resting on top of plate 55 is a carriage 55 having a downwardly extending portion 66 slidably projecting through the slot 5'6 and having a plate 61 secured on the lower surface thereof and slidable in slot 51. The plate 61 is secured to the downwardly projecting portion 66 by any suitable means such as screws 58. The plate 61 has a downwardly projecting portion 69 having rotatably mounted therein a screwthreaded shaft 55 which is threadably mounted in bar 54. Shaft 50 has a peripheral groove 58 into which projects a set screw 59. The other end of shaft 50 has a cross member 55 thereon, having a handle 63 thereon. The member 65 has uprising therefrom a projection 15, which has an arcuate transverse cavity therein for receiving one side of a bolster to be presently described. The member 65 has uprising therefrom a projection 1|, which has a threaded boretherethrough in which a threaded screw 12 is mounted having a crank 13 mounted on the outer end thereof and provided with handle 14. The other end of screw threaded shaft 12 has a peripheral groove 15 therein which penetrates a bore 16 in a projection on a jaw and a set screw 18 is mounted in the projecting portion of jaw 11 having the bore 16 therein and enters the slot 15 for confining the jaw 11 on the end of shaft 12 but permitting rotation of the shaft 12 without rotating jaw 11. Jaw 11 also has an arcuate transverse cavity therein for engaging the opposite side of a bolster shank.

The bolster shank is indicated at 80 and this bolster is what is known as a hook bolster having on the lower end thereof a hook portion 8| with a cavity 82 therein for receiving a shaft, not shown, having a plurality of bevel gears, not shown, thereon for imparting rotation to the packages on the bolsters. The bolster hook portion also has an opening 83 by means of which it can be secured to the frame of the machine when in use. This bolster hook also has a pair of projections 84 and 85, which are used to advantage in a milling operation to be performed on the bolster hook. These projections 84 and 85 are adapted to rest on a plate 81. Secured on the upper side of the bed plate Iii by any suitable means, such as screws 88, and the projections 84 and 85 are adapted to rest on the fiat upper surface of the bar 81. This bar 81 also has a raised bar 89 secured thereon by any suitable means, such as screws 90, against which the right hand lower vertical surface of the hook bolster, as shown in Figure 5 rests when it is clamped in position. The member 81 ma be adjusted vertically by means of suitable shims 9| disposed therebeneath.

The other end of the hook bolster or the portion 50 is adapted to rest on a bar 93 disposed transversely of the machine and supported by suitable bolts 94 rising from the bed plate of the machine and having nuts 95 and 96 thereon by means of which the position of the transverse bar 95 relative to the top surface of bed plate 10 may be adjusted to properly support in a sliding manner the portion 55 of the hook bolster. The cutting tool 41 is adapted to cut an enlarged cavity in the bottom of bearing portion 82 of the hook bolster, the normal lower surface cavity 82 being indicated by dotted lines in Figure 5, whereas the depth of cut of the cutting tool is indicated by a bold line in Figure 5 and it is there observed that the cutting tool forms shoulders 31 and 53 of an enlarged cavity 99 into which a semi-circular bearing W0 is adapted to be pressed and on which new bearing, I00, the bolster shaft which imparts rotation to the bolsters is adapted to be mounted.

In the drawings and specification, there has been set forth a preferred embodiment of the invention, and although specific terms are employed, they are used in a generic and descriptive sense only, and not for purposes of limitation, the scope of the invention being defined in the claims.

We claim:

1. In a milling machine having a rotary shaft provided with a cutting tool in one end thereof, said cutting tool being circular in cross section and semi-circular in longitudinal section and being of greater diameter than the shaft on which it is mounted, movable clamping means for clamping a hook bolster in position, a slide for supporting the hook end of the hook bolster, a second slide for supporting the shank end of the hook bolster, whereby when the hook end of the hook bolster is moved into contact with the cutting tool a semi-circular cavity will be milled therein having shoulders so that a semi-circular bearing can be fitted into the semi-circular cavity.

2. A milling machine for milling a cavity in the bottom of a semi-circular cavity in a hook bolster comprising a rotary cutting tool circular in cross section and semi-circular in longitudinal section and having a diameter substantially greater than the diameter of the cavity already in the bolster, said hook bolster having a shank portion for receiving the yarn package and a hook portion having the cavity therein, a pair of slides for slidably supporting the hook portion and the shank portion, a movable clamping member for clamping the shank portion of the hook bolster and moving the hook portion into engagement with the cutting tool, one of said guides having a shoulder thereon for gauging the position of the bolster so that the cutting tool will enter the bearing cavity in the hook end of the bolster at a predetermined point.

5 3. A milling machine for milling the bearing cavity in the hook portion of hook bolsters to a greater diameter to provide a cavity and a pair of shoulders for receiving a semi-circular hearing, said milling machine having a rotary cutting tool circular in cross section and semi-circular in longitudinal section, a shaft of smaller diameter than the cutting tool on which the cutting tool is mounted, means for clamping a hook bolster and for moving it into engagement with the cutting tool and a plurality of guide means in addition to the clamping means for alining the hook end of the bolster relative to the cutting tool.

EVERETTE L. MANESS.

JAMES D. MCDUFFIE.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS 

